ASUS Z170 Non-K Overclocking Guide
In this quick guide I will explain the process of ASUS Z170 Non-K Overclocking. The non-K OC is really easy and can be done within few minutes. Few days ago I published a short article about overclocking non-K CPUs. Depending on the CPU you can increase the clock between 15-70 % without any problems.
Unlike K-CPUs which can be overclocked using the multiplier, non-K CPUs have to be overclocked using the BCLK. Pre-Skylake CPUs such as Haswell or Devils Canyon could only be overclocked by about 3-5% using the BCLK because the BCLK was still tied to the DMI and the PCIe.
However, for Skylake CPUs, BCLK and PCIe have a dedicated reference clock which always stays at 100 MHz – no matter how you change the BCLK. In other words: You can push the BCLK without worrying about other components.
The non-K BIOS is skipping some parts of the power-management, so there are few things you have to keep in mind:
- The missing power-management will not allow to read out any core temperature. However, you can read-out the package temperature with the tool HWInfo (make sure to stay below 70°C package temperature)
- No C-States. CPUs will always run full speed and full voltage.
- No Turbo-Mode.
- No iGPU.
- Intel AVX is screwed. Some benchmarks like Intel XTU use AVX and you will have about 4-5 times lower score. As far as I know no game is using AVX so it’s no problem to use this for gaming rigs. Not suitable for professional usage tho.
- Avoid high memory clocks. Everything around 2600 MHz will be fine.
For 24/7 overclocking and gaming you don’t have to worry about any of these points. Pentium, i3 and i5 CPUs have a low power consumption which results in a low core temperature for 24/7. As long as follow my guide you don’t have to worry about the missing temperature readout.
Compatible CPUs for non-K OC:
|CPU Name||Cores||Stock Clock||Turbo Clock||Hyperthreading||L3-Cache||TDP||Amazon|
|Pentium G4400||2||3300 MHz||-||No||3 MB||54 W||link|
|Pentium G4400T||2||2900 MHz||-||No||3 MB||35 W|
|Pentium G4500||2||3500 MHz||-||No||3 MB||51 W||link|
|Pentium G4500T||2||3000 MHz||-||No||3 MB||35 W||link|
|Pentium G4520||2||3600 MHz||-||No||3 MB||51 W||link|
|Core i3-6098P||2||3600 MHz||Yes||3MB||54 W||link|
|Core i3-6100||2||3700 MHz||-||Yes||3 MB||51 W||link|
|Core i3-6100T||2||3200 MHz||Yes||3 MB||35 W||link|
|Core i3-6300||2||3800 MHz||-||Yes||4 MB||51 W||link|
|Core i3-6300T||2||3300 MHz||-||Yes||4 MB||35 W||link|
|Core i3-6320||2||3900 MHz||-||Yes||4 MB||51 W||link|
|Core i5-6400||4||2700 MHz||3300 MHz||No||6 MB||65 W||link|
|Core i5-6400T||4||2200 MHz||2800 MHz||No||6 MB||35 W||link|
|Core i5-6402P||4||2800 MHz||3400 MHz||No||6 MB||65 W||link|
|Core i5-6500||4||3200 MHz||3600 MHz||No||6 MB||65 W||link|
|Core i5-6500T||4||2500 MHz||3100 MHz||No||6 MB||35 W||link|
|Core i5-6600||4||3500 MHz||3900 MHz||No||6 MB||65 W||link|
|Core i5-6600T||4||2700 MHz||3500 MHz||No||6 MB||35 W||link|
|Core i7-6700||4||3400 MHz||4000 MHz||Yes||8 MB||65 W||link|
|Core i7-6700T||4||2800 MHz||3600 MHz||Yes||8 MB||35 W||link|
Depending on your budget you should only consider these CPUs:
- Pentium G4400 (Find at Amazon)
- Core i3-6100 (Find at Amazon)
- Core i3-6300 (Find at Amazon)
- Core i5-6400 (Find at Amazon)
- Core i7-6700 (Find at Amazon)
All of the CPUs should easily reach 4400-4500 MHz and a high multiplier is not needed because you can compensate everything with the BCLK.
ASUS Z170 Non-K Overclocking BIOS
First of all get the correct BIOS for your board. You can find the list of BIOSes in the table below.
After downloading, enter the BIOS and use ASUS EZ Flash 3 Utility to update to the Non-K Version:
ASUS Non-K Overclocking Motherboards and BIOSesIn the table below you can find the ASUS motherboards that support Non-K overclocking using the BIOSes listed below. For more information on how to overclock the Skylake Non-K CPUs using ASUS motherboards, check out the Detailed ASUS Z170 Non-K OC Guide.
|Maximus VIII Extreme||Link|
|Maximus VIII Ranger||Link|
|Maximus VIII Hero Alpha||Link|
|Maximus VIII Hero||Link|
|Maximus VIII Gene||Link|
|Maximus VIII Impact||Link|
|Z170 Pro Gaming||Link|
|Z170I Pro Gaming||Link|
!!!!! UPDATE: !!!!
If you have trouble to flash back to the old BIOS, use this guide:
ASUS Z170 Non-K Overclocking Steps
- ASUS Maximus VIII Hero (Find at Amazon)
- Pentium G4500T (Find at Amazon)
- 2 x 4 GB DDR4 G.Skill 3200 MHz
- Noctua NH-D15 (Find at Amazon)
- Thermal Grizzly Hydronaut (Find at Amazon)
- Windows 10
The CPU clock is a result of the BCLK x Multi. E.g. a i3-6100 has a stock clock of 3700 MHz (100×37). For example a BCLK of 120 will result in a core clock of 4440 MHz.
You basically have to change 3 main values to overclock: CPU BCLK, CPU Multi (Ratio) and CPU Core Voltage. While you can always use around 1,325 Volt as CPU Core Voltage, the CPU Multi and BCLK depend on the exact CPU.
Using the ASUS Non-K BIOS, the CPU will always be at the maximum multiplier. This means you only have to change the BCLK, Core Voltage and keep the memory at the correct speed.
|CPU Name||CPU + Ring Multi||BCLK for 4500 MHZ|
Make sure you have a sufficient CPU cooler. Don’t try this with the Intel Boxed cooler.
ASUS Z170 Non-K Overclocking Example
BCLK depends on the CPU. Check values in the table above. Example with Pentium G4500T to 4400 MHz.
- Enter the BIOS
- Go to Advanced CPU Configuration
- – Set Boot Performance Mode to Turbo Performance
- Go to Advanced CPU Configuration and to the sub-menu CPU Power Management Configuration
- – Set Intel(R) SpeedStep(tm) to Disabled
- – Set CPU C states to Disabled
- Go to Extreme Tweaker and to the sub-menu External Digi+ Power Control
- – Set CPU Loadline Calibration to Level 7
- Go back to Extreme Tweaker
- – Set Ai Overclock Tuner to XMP
- – Change the BCLK Frequency to the value you need (in my case 147)
- – Adjust the DRAM Frequency to a value around 2600 MHz
- Set the CPU Core Voltage Override to 1.325
Depending on the CPU quality you migh also need a little bit more CPU Core Voltage. Up to 1.40 Volt is safe to use with sufficient cooling.
If the setting is working well you can also try to use a higher memory clock.
If you have any kind of questions or problems, don’t hesitate to ask in the forums:
Now boot into windows and test the stability with Prime95 1344K for at least one hour. For a detailed Prime95 Guide check HERE
These settings should work for almost all boards and CPUs. If you have problems just let me know in the comments.